Senior Growth Engineer

Citizen Health was founded on the belief — shaped by firsthand lived experiences navigating healthcare — that having the right advocate is the single most important factor in achieving better care and outcomes. By uniquely combining data, AI, and community, Citizen is building a personalized AI advocate powered by patients' complete medical histories and data from thousands of other patients to generate personalized insights for clinical decisions and day-to-day challenges. Starting in rare and complex conditions, patients share their data in exchange for value, enabling biopharma and researchers with seamless access to patients and regulatory-grade data, shaving years off drug development for much-needed treatments.
Citizen is founded by experienced entrepreneurs with multiple successes under their belts and is funded by top-tier investors including 8VC, Transformation Capital, and Headline Ventures, among others. We are a mission-driven team excited to be building the future of consumer healthcare.

We're seeking a Senior Growth Engineer to drive technical initiatives that accelerate our user acquisition, engagement, and retention. You will work at the intersection of engineering, product, and marketing to build, measure, and scale systems that optimize our growth funnel end-to-end - from awareness through activation and retention.

Your work will bridge technical depth with a growth mindset: shipping experiments rapidly, optimizing data-driven systems, and ensuring that every part of the user journey is measurable, performant, and privacy-safe. You’ll collaborate closely with marketing, data, and product teams to turn insights into scalable growth levers.

You’re an engineer with a growth brain - data-fluent, experimentation-minded, and obsessed with driving measurable outcomes. You thrive in high-velocity environments, love collaborating across teams, and can toggle seamlessly between shipping production code and designing data pipelines that feed growth intelligence.

• Prototype and launch growth features - Rapidly build and iterate on onboarding flows, referral programs, landing pages, and other high-impact experiments that drive measurable improvements in conversion and engagement.

• Build and scale growth systems - Develop and maintain the experimentation, attribution, and analytics infrastructure that powers our user acquisition, activation, and retention efforts.

• Implement and optimize CRM integrations - Own the technical setup of our lifecycle marketing stack (CRM platform and downstream channels), ensuring campaigns are data-driven and automated across push, email, and in-app messaging.

• Instrument and maintain data pipelines - Ensure accurate, privacy-safe event tracking and identity resolution across web, mobile, and backend systems (Amplitude, Salesforce, Webflow, CRM).

• Collaborate cross-functionally - Partner with product, marketing, and data teams to define hypotheses, deploy experiments, and translate insights into product and channel improvements.

• 5+ years of software engineering experience, with at least 3 years focused on growth, marketing technology, or experimentation

• High-level proficiency in JavaScript/TypeScript, React, and modern CSS (including CSS-in-JS solutions)

• Deep understanding of event schema design, analytics instrumentation, and A/B testing methodologies

• Hands-on experience with marketing automation and CRM platforms (HubSpot, Braze, Iterable, or equivalent)

• Strong data skills (SQL, APIs, data pipelines) with the ability to translate from data to business decisions

• Proven track record of cross-functional collaboration in high-velocity environments

• Experience optimizing user onboarding flows and improving conversion metrics

• Experience building or maintaining attribution systems across web and mobile

• Hands-on experience with CRM SDK implementation

• Strong proficiency with analytics tools (Amplitude preferred) with the ability to translate insights into growth actions

• Familiarity with personalization technologies and recommendation systems

At Citizen Health, you will be part of an ambitious mission to build innovative AI-driven solutions that redefine the consumer healthcare experience and improve outcomes for millions. We value curiosity, creativity, and collaboration, and we believe in empowering every team member to have an impact. Here, you’ll find:

• The chance to work on pioneering AI technologies and solve complex problems that push the boundaries of what’s possible in healthcare

• The freedom to lead your projects and shape the company’s direction in a mission-driven environment where your work makes a real impact

• A fast-paced, high-growth setting that brings expanding opportunities and clear paths for career progression

• A supportive culture of learning, experimentation, and innovation, where new ideas are encouraged and explored

• A commitment to empathy and diversity, recognizing that our greatest strengths come from our varied perspectives and experiences

• Regular team activities and knowledge sharing, all within a culture that prioritizes well-being and connection

• Competitive salary + equity package

• Comprehensive health, dental, and vision insurance

• Unlimited paid time off, including a generous parental leave

• Flexible hybrid work environment

Don't meet every qualification? No worries! We believe that passion, curiosity, and the right mindset are just as important as a checklist of skills. If you’re excited about what we’re building, we encourage you to apply.

Our Commitment to Diversity & Inclusion: Citizen Health is proud to be an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees. We welcome applicants of all backgrounds, identities, and experiences. Everyone deserves an equal chance to contribute and grow here — regardless of race, gender identity, sexual orientation, religion, national origin, age, disability, or veteran status.